The thread hasn't been active since 2016, I don't expect anyone will be able to help you here, you might want to contact the developer instead. Try not to necrobump ancient threads in the future.There's this: https://github.com/TurtleP/Portal-Bros but I dont know how far this was developed, and i cant compile it because theres no makefile. i dont know how to make one that would support this port but maybe someone here does?